Push Pop Unshift Shift Array Javascript

In JavaScript, shift, unshift, push, and pop are array methods used to add or remove elements. Here's a quick breakdown:

1. push()

• Adds one or more elements to the end of an array
• Returns the new array length.
• Example:

const fruits = ["apple", "banana"];
fruits.push("cherry");
console.log(fruits); // Output: ["apple", "banana", "cherry"]

2. pop()

• Removes the last element from an array
• Returns that element.
• Example:

const fruits = ["apple", "banana", "cherry"];
const last = fruits.pop();
console.log(fruits); // Output: ["apple", "banana"]
console.log(last); // Output: "cherry"

3. unshift()

• Adds one or more elements to the beginning of an array and returns the new array length.
• Example:

const fruits = ["banana", "cherry"];
fruits.unshift("apple");
console.log(fruits); // Output: ["apple", "banana", "cherry"]

4. shift()

• Removes the first element from an array and returns that element.
• Example:

const fruits = ["apple", "banana", "cherry"];
const first = fruits.shift();
console.log(fruits); // Output: ["banana", "cherry"]
console.log(first); // Output: "apple"

Summary

• push() and pop() modify the end of the array.
• unshift() and shift() modify the beginning of the array.